Pipe-end reamer



R. H. MUELLER.

Pl-PE END REAMER. APPLICATION r1150 DEC. 12. 1918.

Patented Mar. 21, 1922.

2 5HEETSSHEET I- Mir/e 11mm; 5 v v 337 552 27..

R. H. MUELLER.

PIPE END REAMER. APPLICATION FILED DEC. 12, 1am.

.59 Z9 51 40 I 2.9 (52 I v 27- 1| f 7 w 67 v 28 2.9 H' I 5 29 -56 as 26I 1 g 16 57 I, 16 16 15 I 17, fi I 77 I 14 70 1 I S I 72 10 i 1 7&5 M Q15 y 1 f} P1 9. Z I I' I I' f 5 if W I l 1/. I 17; .u-

47 I 46 amumfllo'z 702 ,RHMZwZZen QUMII coo Patented Mar. 21, 1922.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

ROBERT MUELLER, OF DECATUR, ILLINGIS, ASSIGNOR TO ADOLPH MUELLER,TRUSTEE, OF DECATUR, ILLINOIS.

PIPE-END REAMER.

Patented Mai-.21, 1922.

Application filed December 12, 1918. Serial No. 266,432.

To all whom it may concern:

Be it known that 1, Ronmrr ll. MUELLER, a citizen of the United States,residing at Decatur, in the county of Macon and State of Illinois, haveinvented new and useful Improvements in Pipe-End Reainers, of which thefollowing is a specification.

This invention relates to boring devices, and particularly to reamers ofa type for boring out the ends of pipes and the like.

It is the purpose of the present invention to provide a reamer, theblades of which may be easily and quickly inserted and removed forpurposes of renewal and repair, and which blades, after they are inposition, are securely held in place. A reamer constructed in accordancewith the present invention consists of a relatively few number of parts,each of which parts is simple in construction and the parts may bereadily assembled and disassembled, so that the reamers can be cheaplymanufactured and placed upon the market at a relatively low cost.

It is a further object of my invention to provide a. reamer, each of theparts of which, and particularly the body portion on which great strainis exerted, is extremely strong, so that the reamer is very durable andeflicient in service.

The above and other objects of my invention are obtained in thestructure desc *ibed in the following specification and illustrated inthe accompanying drawings, and wherein:

Fig. 1 as a longitudinal sectional view through one embodiment of myimproved re-amer.

Fig. 2 is an elevational view of the reamer shown in Fig. 1, with theforward portion thereof cut away on line 2-2 ofFig. 1.

Fig. 3 is a top plan view of the body portion or stock of my improvedreamer.

Fig. t is a transverse sectional view through the stock of the reamershown in Fig. 1 and taken substantially on line 1- 1 of said figure.

Fig. 5 is a sectional view taken on line 5-5 of Fig. 1.

Fig. 6 is similar to Fig. 1, but illustrates another embodiment of myinvention.

Fig. 7 is a fragmentary view, showing in section a slightly differentconstruction from that illustrated in Fig. 6.

Referring to said drawings, wherein like numerals represent like partsin the several views, 10 designates the stock or body portion of theimproved reamer, which in the preferred form or embodiment, as shown inFigures 1 to 41;, is by preference in one piece. This body portion ispreferably a casting of malleable iron, so that it is eX- tremelystrong, and breakage under the roughest usage is insured against. Thebody portion 10 has a head 11, which is an nular and stepped, and fromwhich extends a spindle portion 12, terminating in an enlargement 13,which tapers towards a point at its extremity. The spindle portion 12has a plurality of integral ribs 14c, which serve to reinforce thestocklO, without materially increasing the weight thereof. The steppedhead 11 in Figure 1 is integral with the remaining. portion of theStOC-K, and it has a circular flange 15', provided at its edge withequally spaced notches 16, adapted to receive the upper ends of thereamer blades 17. The inner edges of the notches 16 are at an angle tothelongitudinal axis of the bodyport-ion-10: The upper step 18 of thehead 11 is of less diameter than the lower step or fiange 15, so as toprovide an annular recess above the flange 15 for the reception oftheupper extremities of the reamer blades 1?. The circumferential edgeof the step 18 is designated in the drawings by numeral 19. The conicalenlargement 13 is provided with a plurality of lon itudinally extendingslots 20, which are spaced angula-rly in a manner similar to the notches16, so as to receive the lower ends of the reamer blades 17.

Each of the reamer blades 17, which is rectangular in cross-section andconstructed of s eel as is usual, is bevelled as at 21, so that theinner edge-of the same will engage the inner wallof one of thegroovesandslots 20. Adjacent the upper end of each of the blades isa notch 22,which is co-extensive in length to the thickness of the flange 15, so asto snugly receive the same. The notch 22- of each bladeprovides at theupper extremity of the blade a lug 23, which is located within theannular groove of the head, and the inner edge of which is adapted tosnugly engage against the circumferential edge 19 of the stepped portion18. It will be seen that the inner walls of the notches 22 are inclinedsimilarly to the opposed faces ofthe notches 16 and this is of advantagefrom a practical standpoint as close engagement is obtained between theedges of the blades and the opposed surfaces of the head 11.Furthermore, when the reamer is in use, pres sure is exerted on theblades which tends to cause the blades to move upwardly towards thehandle of the reamer, and by providing the abutting inclined surfaces inthe notches l6 and 22 this direction of movement of the rcamer blades isresisted.

Extending from the head in a direction opposite to, but in axialalignment with the spindle 12, is a stem having a circular portion 25 apolygonal or square portion 25 and a circular spindle portion 26, ofless diameter than the squared portion 25. The stem of the stock isadapted to receive the ratchet handle 27, which comprises in the presentinstance, a tubularportion 28, terminating at one end in a 29, betweenwhich is received a ratchet wheel 30. Vithin the bore of the tubularportion 28 is a plunger 31, having on its inner end a pawl adapted toengage the teeth of the ratchet wheel 39. The plunger 31 is resilientlyurged towards the ratchet wheel by means of a coiled spring 33, which isretained in place, and the tension of which is regulated by a plug 34threaded into the tubular portion 28.. The outer end of the bore of thetubular portion 28 is threaded, soas to receive the threaded end of anextension handle 35. V i

The opening in the lower lug. 29 of the ratchet handle is of suchdiameter as to snugly receive the circular portion 24% of the likeportion 39 of the brace knob is a stem of the body portion of thereamer, while the opening of the upper lug 29 is of such diameter as tosnugly receive the spindle portion 26. It is of course understood thatthe opening through the ratchet wheel 30 is of like cross-section as thesquared portion 25, so as to receive the latte Located between thestepped portion 18 and the ratchet handle is a cap 86,having an openingfor the reception of the circular portion 24, and also having a flangeor skirt 37 which fits closely about the flange 15 and locks the upperends of the reamer blades 17 in place. The metal cap 36' preventsoutward displacement of the blades 17.

The numeral 38 designates a brace-knob, the stem portion of which isrecessed so as to receive the outer end of the spindle portion 26 of thestock. The lower end of the stem or sleeve-like portion 39 of the braceknob, rests within an angular recess 40 located in the outer surface ofthe ear 29 and about the through opening therein. Adjacent the outer endof the spindle portion26 is a circumferential grooveetl. In the sleeveradial opening through which a pin 42 is adapted to extend, and this pinat its inner end engages in the groove 41. The opening through which thepin 42 extends is located Within a circumferential groove 42 in the pairof spaced apertured ears sleeve-like this groove is adapted to receive aspring clamp 4-3 which prevents the pin 4-2 from be coming displaced,this structure being most clearly shown in Fig. 5. 7

In the embodiment of the invention disclosed in Fig. 6, I have shown thehead 11 as being separate from the stock 10. In this case the head 11comprises a circular disc having a central aperture adapted to receive acircular portion lt of the stockand the head. rests upon a shoulder 45integral with the stock 10. is not stepped, and the blades l7 are deviodoi. the notches 22. The upper ends of the blades 17 engage withinnotches 16 in the head ll and are maintained against displacement by acap 36 For the purpose of retaining the lower ends of the blade 17against displacement from the slots 19 of the enlargement 13 a screw 46is provided, this screw being adapted to be screwed into a threadedrecess in the extremity of the enlargcment l3, and having its inner facerecessed, as at 4.7, so as to receive the lower ends of the blades 17. V

In Fig. 7,the head 11 is separate from the stock 10, as in theembodiment shown in Fig. 6, but in this instance the head 11 is stoppedand the blade 17 has a lug 23 similarly to corresponding parts shown inthe embodiment of Fig. l.

The manner of assembling the parts of my improved reamer will be readilyunderstood. Referring to Fig. l, the blades 17 are first placed withtheir lower ends in the slots 20 and their upper end in the notches 16.The cap 36 is then placed over the stem and brought into position whereit encircles the head 15. ed in place with the lower lug 29 encirclingthe circular portion 241-, and the outer lug 29 encircling the spindleportion 26. It will be seen from the drawings that the lower face of theupper lug 29 of the ratchet handle rests upon the squared portion 25 soas to prevent the handle .f1'0111 coming into too close engagement withthe cap 36." The brace knob 38 is next placed over the spindle 26;

the pin 42 is inserted in the opening in the sleeve-like portion 39; andthen the spring clamp 43 is placed within the groove 42 providedtherefor, so as to prevent the pin 42 from "falling out of place. 1 i

It will be seen from the above description that in a reanier constructedin accordance with this invention, the cap 86, the ratchet handle 27 andthe brace knob 38 are all securely locked in place by a common lockingmeans, namely the pin 42, and, therefore, the

parts may be readily and quickly assembled. 7

Each part of the reamer is relatively simple in structure, and theblades are securely held in place.

It is of course obvious that my invention portion39 of the brace-knob,and

In this instance, the head 11 The ratchet handle is then insertissusceptible of various modifications and changes which are Withinthespirit of the invention without departing from the scope of thefollowing claims.

\Vhat I claim is:

1. In a reamer, the combination of a body portion having blade seatsformed at its edge, a spindle portion extending from said body portionand having blade-receiving seats formed therein, reamer blades looselyengaged at their upper ends with said body blade seats and at theirlower ends with said spindle blade seats, and vertically shit'tablemeans for holding said blades in the seats.

2. In a reamer, the combination ota body portion having notches withshouldered bottoms formed in its edge to provide blade seats, a spindleportion extending from said body portion and having blade receivingseats formed therein, reamer blades notched at their upper ends toengage the shouldered bottoms of said blade seats so as to lock themagainst longitudinal movement but permit lateral removal and engaging attheir lower ends with said spindle seats, and an annular slip ring tohold the upper ends of said blades against lateral displacement. 7

3. In a reamer, the combination of a body portion having blade seatsformed in its edge, a spindle portion extending from said body portionand having blade receiving seats formed therein, reamer blades havingtheir ends loosely mounted in said seats and laterally removabletherefrom, and a ver tically shiftable ring on the'body portion to holdsaid blades against lateral displacement. I

a. In a reamer, the combination of a body portion having blade seatsformed in its edge, a spindle portion extending from said body portionand having blade receiving seats formed therein, reamer blades looselymounted in said seats and laterally removable therefrom, a slip ring toengage the upper ends of said blades and hold them against lateraldisplacement, and detachable member at the end of said spindle to engagethe lower ends of said blades and hold them against lateraldisplacement.

5. In a reamer, the combination of a stepped body portion having notchesin its edge to form bladereceiving seats, a blade receiving spindleextending from said body portion, reamer blades having notches at theirupper ends to engage the seats in said stepped portion so as to holdsaid blades against longitudinal movement but laterally removable fromsaid seats and loosely engaged at their lower ends with said spindleseats, and means for holding said blades against lateral displacement.

6. In a reamer, the combination of a body portion having blade seatsformed in its periphery, a spindle extending from said body portion, andhaving blade receiving seats formed therein, reamer blades looselymounted at their opposite ends in said body and spindle seats, avertically moveable blade holding ring to engage the upper ends of saidblades and hold them against lateral movement, and a removable cuppedscrew at the lower end of said blade receiving spindle to engage andhold the lower ends of said blades against lateral displacement.

7 In a reamer, the combination of a spindle having an enlarged portionprovided with blade receiving seats, a body portion on said spindlehaving blade receiving seats formed in its edge, reamer blades havingtheir upper ends engaged with said body seats and their lower endsengaged with said spindle seats, means carried by said brace spindle toengage the upper ends of said blades and hold them in their seats, andmeans at the lower end of said blade holding spindle to engage over thelower ends of said blades and hold them in their seats.

8. In a reamer, the combination of a spindle having an enlarged portionprovided with blade receiving seats, a body portion removably mounted onsaid spindle and having blade receiving seats formed in its edge, reamerblades having their upper ends engaged with said body seats and theirlower ends engaged with said spindle seats, means carried by said bracespindle to engage the upper ends of said blades and hold them in theirseats, and means at the lower end of said blade holding spindle toengage over the lower ends of said blades and hold them in their seats.

In testimony whereof I havefl' ereunto set my hand.

' ROBERT H. MUELLER.

